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/*
* vfio based device assignment support - platform devices
*
* Copyright Linaro Limited, 2014
*
* Authors:
* Kim Phillips <kim.phillips@linaro.org>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
* Based on vfio based PCI device assignment support:
* Copyright Red Hat, Inc. 2012
*/
#ifndef HW_VFIO_VFIO_PLATFORM_H
#define HW_VFIO_VFIO_PLATFORM_H
#include "hw/sysbus.h"
#include "hw/vfio/vfio-common.h"
#include "qemu/event_notifier.h"
#include "qemu/queue.h"
#include "hw/irq.h"
#define TYPE_VFIO_PLATFORM "vfio-platform"
enum {
VFIO_IRQ_INACTIVE = 0,
VFIO_IRQ_PENDING = 1,
VFIO_IRQ_ACTIVE = 2,
/* VFIO_IRQ_ACTIVE_AND_PENDING cannot happen with VFIO */
};
typedef struct VFIOINTp {
QLIST_ENTRY(VFIOINTp) next; /* entry for IRQ list */
QSIMPLEQ_ENTRY(VFIOINTp) pqnext; /* entry for pending IRQ queue */
EventNotifier *interrupt; /* eventfd triggered on interrupt */
EventNotifier *unmask; /* eventfd for unmask on QEMU bypass */
qemu_irq qemuirq;
struct VFIOPlatformDevice *vdev; /* back pointer to device */
int state; /* inactive, pending, active */
uint8_t pin; /* index */
uint32_t flags; /* IRQ info flags */
bool kvm_accel; /* set when QEMU bypass through KVM enabled */
} VFIOINTp;
/* function type for user side eventfd handler */
typedef void (*eventfd_user_side_handler_t)(VFIOINTp *intp);
typedef struct VFIOPlatformDevice {
SysBusDevice sbdev;
VFIODevice vbasedev; /* not a QOM object */
VFIORegion **regions;
QLIST_HEAD(, VFIOINTp) intp_list; /* list of IRQs */
/* queue of pending IRQs */
QSIMPLEQ_HEAD(pending_intp_queue, VFIOINTp) pending_intp_queue;
char *compat; /* DT compatible values, separated by NUL */
unsigned int num_compat; /* number of compatible values */
uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */
QEMUTimer *mmap_timer; /* allows fast-path resume after IRQ hit */
QemuMutex intp_mutex; /* protect the intp_list IRQ state */
bool irqfd_allowed; /* debug option to force irqfd on/off */
} VFIOPlatformDevice;
typedef struct VFIOPlatformDeviceClass {
/*< private >*/
SysBusDeviceClass parent_class;
/*< public >*/
} VFIOPlatformDeviceClass;
#define VFIO_PLATFORM_DEVICE(obj) \
OBJECT_CHECK(VFIOPlatformDevice, (obj), TYPE_VFIO_PLATFORM)
#define VFIO_PLATFORM_DEVICE_CLASS(klass) \
OBJECT_CLASS_CHECK(VFIOPlatformDeviceClass, (klass), TYPE_VFIO_PLATFORM)
#define VFIO_PLATFORM_DEVICE_GET_CLASS(obj) \
OBJECT_GET_CLASS(VFIOPlatformDeviceClass, (obj), TYPE_VFIO_PLATFORM)
#endif /* HW_VFIO_VFIO_PLATFORM_H */
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